Wheeled scraper.



I N0 .,727,208. PATENTED MAY 5, 1903.

G. H. SAWYER.

WHEELED SGRAPER.

.. APPLICATION IIIQED FEB. 2, 1903.

N0 MODEL. V 6 SHEETS-SHEET 1.-

Noam PETERS co, wuorourn WASNINGYG Ne 727,20&

0 SAWYER. WHEELHD S'GRAPER.

APPLICATION FILED FEB. 2. 1903.

N0 MODEL.

PATENTED MAY 5, 1903.

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PATENTED MAY 5, .1903. C. H. SAWYER. I

WHEELED SG'RAPER.

APPLICATION FILED r23. 2, 1903.

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N0 MODEL.

No 727,208. PATENTED MAY 5, 1903.

- C. H. SAWYER.

WHEELED SORAPER.

APPLICATION FILED FEB. 2, 1903.

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No. 727,208. PATENTED MAY 5, 1903.

c. H. SAWYER. WHEELED SGRAP'ER.

, APPLIOATION FILED FEB. 2, 1903. N0 MODEL. v 6 SHEETS-SHEET 5.

PATENTED MAY 5, 1903. G. H. SAWYER. v WHEELED SCRAPER. APPLICATION FILED FEB. 2. 1903v 6 SHEETS-SHEET 6.

N0 MODEL.

UNITED STATES I Patented May 5, 1903.

FFICE.

PATENT HALF TO M. E. SAVVYER, OF

WHEELED MINNEAPOLIS, MINNESOTA.

SCRAPER.

SPECIFICATION forming part of Letters Patent No. 727,208, dated Ma 5, 1903.

Applicatioufiled February 2.11903.

To all whmn it may concern:

Be it known that I, CHARLES 'H. SA-WYER, a citizen of the United States, residing at Minneapolis, in the county of Hennepin andState of Minnesota, have invented certain new and useful Improvements in \Vheeled Scrapers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My present invention relates to wheeled scrapers, and has for its object-toimprove the same in the several particulars hereinafter set forth.

To. such ends it consists of the novel de vices and combinations of devices hereinafter described, and defined in the claims.

The said invention is in the nature-of an improvement on the device set forth and claimed, broadly, in my prior application, Serial No. 101,292, filed April 3, 1902, and allowed October 30, 1902, entitled Wheeled scraper.

The invention is illustrated in the accompanyin g drawings, wherein like characters indicate like parts throughout the severalviews.

Figure 1 is a plan of-the improved scraper. Fig. 2 is a left side elevation of the scraper with theleft side wheel removed. Figs. 3and 4 aresiinilar views to Fig. 2, but -with some parts broken away. and with VEtIlOUSPfiJlt-S shown in different positions. Fig. 5 is a. de-' tail in sectionon the'line x m of Fig. 1,-bu't showing the parts in the same p'ositionas in Fig. 4. Fig. 6 is a detail in section on the same line'as Fig. 5, but showing the parts in difierent positions. Fig. 7 is a view 'corre sponding to Figs. 2, 3, and 4, but showing the parts in still difierent positions. Fig. 8' is a detail corresponding to Figs. 5 and 6, but showing the parts in the same position as in Fig. 7. Fig. 9 is'a detail inside elevation, showing a portion of the pole and a lock for the dragbail. Fig. 10 is a plan view of the parts shown in Fig. 9. Fig. 11 is a transverse vertical sec tion on the-line as x of Fig. 9; Fig. 12 is a view corresponding to Fig. 9, but showing the parts in difierent positions. Fig. 13 is a section taken approximately on the line 9: x of Fig. 2, showing a portion of the scraper-bowl,

Serial No. 141,405. (No model.)

a portion of one of the wheels, a portion of the crank-axle, and one of the clutches for con necting said crank-axle'to said wheel. Fig.

14 is a detail-showing substantially what is shown in Fig-.-l3 sectioned on the line 13 00 of Fig. 2. Fig. 15 is a section on the line .70 x of Fig. 13. Fig. 16 is a section on the line 00 x of Fig. 15 through the parts shown in Fig. 13,"soine partssbeingbroken away; and Fig. 17 is a view, partly in'plan and partlyin section, showing the clutch-hub and elements for connectingthe same to the crank-axle.

. The numeral 1 indicates a crank-axle, upon the trunnion-like ends of which truck-wheels 2 aremounted in thensual or any suitable way. The numeral 3 indicates the scraper-bowl,

which when raised is suspended from the raised crank portion of the axle l by means tral rearwardly-projecting portion 8, which serves as a handpiece by means of which the lever may. be manipulated.,. The sleeve 5 is loosely mounted on the swinging crank portion of the axle 1, which portion of said axle affords a fulcrum for the said lifting-lever. The prongs of=the.lifting-lever4 atrtheir forward ends are pivoted to dependinglinks 9, the lower ends of which areriveted or otherwise rigidly securedltto the forward side portions of the scrapei'bowl-.3. To detachably connect the rear portion of the scraper-bowl 3 to the rear portion of the lifting-lever 4, a latch-dog 10 is pivoted to the portion 8 of said lever and is adapted to engage witha lug 11 on the rear portionof said bowl. The dog 10 is shownas. providedw-ithfa projecting finger 12, by means of which it may be readily released from the saidlug 11. Atits rear end the bowl 3 is shown as provided with hand-bars 13, secured to the sides thereof. Secured to the sides of the bowl, near its forward end, is a pair of slotted coupling-brackets 14, in which the headed rear ends 15 of a so-called drag-bail 16 are mounted for pivotal and for limited sliding movements.

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cam lever 26.

To the forward and transversely-extended portion of the drag-bail16 are rigidly secured the rearwardly-projecting prongs of a supplemental bail-section 17, which is formed with a loop or eye 18, that embraces and slides freely upon the pole 19. at its rear end is connected to the crank portion of the axle by a loose coupling-link 20,-

which, as shown, is loosely pivoted on the intermediate portion of the sleeve 5 and is pivoted at its forward end between laterallyspaced straps 21, rigid on the rear end of said pole. As shown, the straps 21 are curved downward, and to the depending ends thereof is pivoted the rear end of the draft-bar 22. The forward end of this draft-bar 22 is provided with a clevis 23, to which a two or three horse evener maybe attached in the usual or any suitable way. Further, the forward end of said draft-bar is shown as suspended from the pole by a short chain 24.

\Vhen the parts are inthe position shown in Fig. 2, the loop or eye 18 of the draft-bail is locked to the pole by a hook-like dog 25, which, as shown, is pivoted at its forward end to a lug carried by the pole and is provided at its free rear end with a pivoted releasing To the free end of said lever 26 is pivoted the forward end of a trip-rod 27, the rear end of which, as shown, rests loosely on a guide 28, applied to the transverse portion of thelifting-lever 4.

Chains or flexible connections 29 connect the prongs of the d rag-bail to the sides of the scraper-howl at points above the brackets 14, as clearly shown in Figs. 1, 2, and elsewhere. On one of the prongs of the section 17 of the drag-bailis pivoted for a limited movement a longlever-likecatch-pawl or dump-latch 30, which when the bowl and other parts are turned upward engages with a. lug 31 on the rear portion of the scraper-bowl and locks the said bowl, as shown in Fig. 3, all as will be hereinafter more fully described. Rigidly secured to each side of the crank-axle and surrounding the inner portions of the hubs of the wheels is a pair of so-oalled clutchsleeves 32. As shown, these clutch-sleeves are notched to fit the adjacent side portions of the crank-axle and are provided with pairs of studs 33, that straddle the sides of the axle and work through clamping-plates 34 and 35 and are provided at their outer ends with nuts 36. The clamping plates 34 press against the sides of the axle, and on the said studs 33, between the said plates 34 and 35, are placed spaeing-thimbles 37. (8% particularly Figs. 13 and 17.) Spring-pressed clutch-(logs 38 are pivoted one to each clutchsleeve 32, being mounted in longitudinallyextended peripheral notches or seats formed in said sleeves. Each clutch-dog 38 cooper ates with clutchteeth or driving-lugs 39, formed on the adjacent portions of the hubs of the'wheels. (See Figs. 13, 15; and 16.) Again, each dog is connected by a chain or flexible connection 40 to the adjacent side The pole 19' of the scraper-bowl, as clearly shown in Figs. 1 and 2 and elsewhere.

Applied to each side of the scraper-bowl is an axle-locking spring-latch 41. The free and rearwardly projecting ends of these latches will engage the trunnions of the crankaxle just inward of the clutch-sleeves 32 and lock the axle and the wheels rearward, as shown in Fig. 2. One of these spring latches 41 is provided at its free end with a projecting hammer or bell-clapper 42, which at a time hereinafter stated will strike and sound a bell 42, shown as secured on the left-hand side of the scraper-bowl 3.

To each link 9 of the scraper-bowl is loosely pivoted a long rearwardly-projecting gravityactuated catch dog or hook 433, which when the parts are moved into the positions shown in Figs. 4 and 6 engage with the forward members of the spacing-thimble 37, which thimbles, it will be remembered, are rigidly secured with respect to the clutchsleeves 32 and trunnion portions of the crankaxle. The important function performed by these catch hooks-or dogs will be made clear in the description of the operation.

The outer members of the spacing-blocks 7 are shown as provided with outwardly-projecting stop-lugs 7, which in the position of the parts shown in Fig. 2 engage the sides of the crank-axle and limit the forward swinging movement of the crank portion of said axle, or, in other words, the rearward movement of the truck-wheels with respect to other parts of the device. The forwardly-projecting prongs of the lifting frame or lever 4 are provided with fixed stop-lugs 44 and with ad justably-secured stop-blocks 45, the latter of which, as shown, have a'series' of perforations, through which bolts 46 may be passed to connect the same to the prongs of said lever 4. In the positions of the parts shown in Fig. 4 the lugs 44 engage the links 9 and limit the upward movement of the lifting-lever 4. In the positions of the parts shown in Figs. 4 and 7 the stop-blocks engage the peripheral portions of the clutch-sleeves 32 and limit the movement of the forward portion of the lifting-frame toward the trunnions of the crank-axle. Furthermore, in the position shown in Fig. 4 the stop-blocks 45 by their engagement with the clutch-sleeves afford a fulcrum on which the lifting-lever may be rocked in its movement downward toward the position shown in Fig. 7.

The various relations of the parts described will more fully appear in the description of the operation.

Operation: Fig.2 illustrates the positions of the parts ofthe scraper for movement over the ground with a loaded bowl. tion of the parts it willbe noted that the stoplugs 7 and the latches 41 act upon the sides of the cran k-axle to rigidly'lock the said axle against movement either rearward or for ward with respect to other portions of the device. At this time, it will also benoted, the

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In this posichains 29 are drawn taut, while the heads 15 of the drag-bar 16 are forced rearward in the slots of the brackets 14. Again, in said position of the parts the chains 40 are drawn taut and the clutch-dogs 38 are held in inoperative positions, as shown in Fig. 16. To drop the scraper-bowl and throw the same into action, the latch-dog 10 is first released from the lug 11, and the lifting-lever 4 is then forced upward to its extreme position, as shown in Fig. 4. In the position of the parts shown in Fig. 4 the heads of the drag-bail 16 are drawn forward or into engagement with the forward portions of the brackets 14, so that under the forward movement of the scraper the scraper-bowl will be drawn through the ground by the said drag-bail. Furthermore, in this position of the parts it is important to note that the clutch-tripping chains .40 are still drawn taut,.so as to hold the clutchdogs inoperative, and it is further important to note that the catch hooks or pawls 43 at this time engage with the spacing-sleeves 37, as before described and as best shownin Figs. 5 and 4. In throwing the lifting-lever 4 forward or upward and the bowl downward, as shown in Fig. 4, the wheels and the crankaxle are of necessity forced forwardwith respect to the pole, and to permit this relative movement the pole-coupling link 20 must be turned approximately straight upward. To lift the loaded scraper from or partially from the ground and .to again connect the latchdog 10 to the lug 11 on the rear end of the scraper-bowl, the rear end of the lifting-lever 4 must of course be again forced downward, approximately as shown in Fig. 7. In Fig. 4 the crank-axle is thrown upward of its dead-center, while in the position shown in Fig. 7 itis thrown rearward of its dead-center. It is in accomplishing this movement from the position shown in Fig. 4 into the position .shown in Fig. 7 that the catch dogs or hooks 43 perform their important function-to wit, they hold the trunnions of the crank-axle, and hence the wheels, against rearward movement with respect to the pole, while thelifting-lever is being forced downward and the crank portion of the axle turned from a position forward into a position rearward of its deadcenter, or a vertical position. In the po sition of the parts shown in Fig. 7 the chains are given slack, so that the clutch-dogs 38 are thrown into engagement with'certain of the clutch-teeth 39 on the hubs of the wheels. Hence as the scraper is drawn forward and the truck-wheels turned the crank-axle being at this time locked to the wheels will be with respect to the pole, so that the pole-coup ling 20 is then turned intoapproximatelya horizontal-position and the chains-40 become again taut and again render the clutch-dogs 38 inoperative. As the crank-axle and other parts move from the position indicated in Fig. 7 back into the position indicated in Fig. 2 the inner portions of the aXle-trunnions first engage and force downward the free ends of the spring-latches 41 and then upon reaching the position shown in Fig. 2 pass beyond the said latches, permitting them to quickly spring into locking engagement therewith. This quick movement of the left-hand latch 41 causes the hammer 42 to strike and sound the bell 42 thus automatically giving a signal that the loaded scraper is completely raised and that the scraper is then ready to be drawn away with the load.

The links 9 of the scraper-bowl are provided with shoulders 9, upon which the catch-pawls 43 rest when the parts are in the normal positions indicated in Fig. 2.

In practice two teams of horses are usually employed to draw the scraper-bowl through the ground and raise the same, and then when the load is raised and the parts of the scraper brought to the positions shown in Fig. 2 the 'lead team is uncoupled. The signal for un? coupling the lead tea'in is in thisway automatically given at the proper time, whereas before it has been given by the operator of the scraper and frequently not just at the proper time.

To dump the load from the scraper, the lifting-lever, together with the scraping-bowl, is

Fig. 3; but to permit this movement the dragbailmust first be released, so that it can slide rearward of the pole. This is quickly accomplished simply loydrawing on the trip-rod 27, thereby moving thelever 26 and the dog 25 into the position shown in Fig. 12, in which position said parts 25 and 26 remain until the drag-bail is again forced forward by the movement of the lifting-lever and bowl back into back to normal position, and will then pass normal position shown in Fig. 9.

It will of course be understood thatthe claimed.

What I claim, and desire to secure by Letters Patent of the United States, is as follows:

with a crank-axle, of a lifting-lever pivoted to the crank portion of said axle, a scraperbowl hinged to the forward portion of. said lifting-lever and detachably connected to the rear portion thereof, and a catch dog or hook for locking the trunnion portions of said crank-axle in a forward position, with respect to the pole, so that the crank portion of said axle may be turned rearward of its vertical dead-center, by a downward movement of turned forward into the position shown in I the positions, shown in Fig. 2, under which movement the loop or eye 18 of the said dragbail will strike the lever 26, throwing the same under the nose of the dog 25- back into the device is capable of modification within the. scope of myinvention as hereinset forthand.

1. In a wheeled scraper, the combination,

said lifting-lever, substantially as described.

2. In a wheeled scraper, the combination with a crank-axle, of a pole, a link connecting said pole to the crank portion of said axle,

for a hinge-like movement, a lifting-lever also pivoted on the crank portion of said axle, a scraper-bowl hinged to the forward portion of said lifting-lever and detachably connected to the rear portion thereof, an automatic clutch, for connecting said crank-axle to one of the truck-wheels, for a limited upward and forward movement, and an automaticallyactuated catch dog or hook, pivoted to a part carried by the scraper-bowl and engageable with a trunnion portion of said crank-axle, to lock the same, and the wheels, in a forward position with respect to the pole, so that the crank portion of said axle maybe turned rearward of-its vertical dead-center, by a downward movement of the rear end of said lifting-lever, substantially as described.

3. In a Wheeled scraper, the combination with a crank-axle, of a lifting-lever pivoted to the crank portion of said axle, a scraperbowl suspended by said lifting-lever, a pole, and a link connecting said pole to the crank portion of said axle, for a limited hinge-likegong, and automatic means for sounding the same, when the crank-axle has been moved so as to raise said bowl, substantially as described.

6. In a wheeled scraper, the combination with a crank-axle, of a lifting-lever pivoted on the crank portion of said axle, a clutch for connecting said cran k-axle to one of the truckwheels, for a limited movement, a scraperboWl hinged at its forward end, to the forward end of said lifting-lever, and detachably connected, at its rear end, to the rear portion of said lifting-lever, a hell or gong onthe scraper-bowl, and a spring-latch 41, provided with a hammer 4:2, for action on said bell, and adapted to be engaged and operated by the crank-axle, under that movement of said axle which raises said scraper-bowl to an elevated normal position,'substantially as described.

7. In a wheeled scraper, the combination with a crank-axle, of a lifting-frame pivoted on the crank portion of said axle, a scraperbowl hinged to the forward portion of said axle and detachably connected to the rear portion thereof, a stop on said lifting-lever engageable with said axle, to limit the forward swinging movements thereof, and a spring-latch on the scraper-bowl, engageable with a lower portion of said axle, to hold the wheels rearward, when the bowl is raised, substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

CHARLES H. SAVVYER.

Witnesses:

ELIZABETH H. KELIHER, F. D. MERCHANT. 

